Acoustic cone



FIG. 1 is a top, front perspective view of my design;

FIG. 2 is a bottom, front perspective of my design;

FIG. 3 is a front view of my design, the rear view being the same;

FIG. 4 is a left view of my design, rotated 45 degrees from the front view;

FIG. 5 is a top view of my design; and,

FIG. 6 is a bottom view of my design.

Elements in the figures shown in dash-dash lines form no part of the claimed design. 

CLAIM I claim the ornamental design for an acoustic cone, as shown and described. 